Water-filter.



PATENTED JULY 18, l905.

M. N; LYNN.

WATER FILTER.

APPLICATION FILED SEPT. so, 1904.

ANuIm/ lea/cum on, mm'ro-unncR/mmu WAIBNG'ION. n, r

Patented July 18, 1905.

PATENT FFICE.

MIRABEAU NORMAN LYNN, OF CINCINNATI, OHIO, ASSIGNOR- TO THE LYNN FILTERMANUFACTURING COMPANY, OF CINCINNATI, OHIO,

A CORPORATION OF OHIO.

WATER-FILTER.

SPECIFICATION forming part of Letters Patent No. 795,047, dated July 18,1905.

Application filedSeptember 30, 1904.. Serial No. 226,651.

T 0 all whom/ it may concern/.-

Be it known that I, MIRABEAU NORMAN LYNN, a citizen of the UnitedStates, residing at Cincinnati, in the county of Hamilton and State ofOhio, have invented a new and useful VVater-Filter, of which thefollowing is aspecification.

My invention relates to that class of waterfilters in which thefiltering medium is a cylindrical tube of stone or artificial stone andwhich have a scraping or cleaning device 0perated from the exteriorwithout taking the filter apart.

The objects of my invention are, first, to simplify the construction ofthis style of filter so as to have but one stufling-joint and thatalways subject to compression by a stuffingnut and to secure the outletfor filtered water at the same end of the filter at which thestu'fiing-nut is located; second, to secure a more easily operatedcleaning device or scraper of more perfect bearing upon thefiltrationstone; third, a simpler and better spring by which thescraping device may be kept in contact with the filtration-stone as thelatter is worn to a smaller diameter by usage. I attain these objects bythe mechanism illustrated in the accompanying drawings, in which--Figure 1 is a vertical section of the entire machine. Fig. Q'is a sideview of the filtration-tube and scraper. Fig. 3 is a section on the linem of Fig. 1.

Similar letters refer to similar parts throughout the several views.

A is a shaft which runs through the center of the cylinder, carrying theframe E of the scraping device. a is a wheel by which the same isrevolved.

B is the filtration-cylinder or filtering-tube, being hollow through thecenter or axis.

C is the top casting, end piece, or lid.

D is the center tube through which the red A passes. It is threaded intothe top casting or lid at (Z. It has a fiange (l' at the opposite end,by means of which it holds the filter-tube t0 the top casting.

E is the scraper-frame, which is borne upon the shaft A, having twoarms, one of which, e, extends parallel to and one-half the length ofthe filter-tube. The other, 0, extends the whole length of thefilter-tube.

F is the exterior casing of the filter. It is provided with an inlet fand an outlet f to permit the dirty water to flow out at the time thefilter is cleaned and flushed and serves no function other than as acasing for the entire machine and for that reason is not furtherelaborated.

G is a stuifing-nut surrounding the shaftA and threaded into the topcasting at g. Its purpose is the compression of the packing in the glandI and may be tightened from time to time, as may be necessary. Referringto Fig. 1 of the drawings, it will be noted that the top C has a slightinner flange adjacent to the threaded part (Z thereof, forming a borefor the packing I larger than the diameter of the threaded part (Z. Thislarger bore receives the packingI, which latter thereby takes over thejoint between the channels for the filtered and unfiltered water of thecasing formed by the threads (Z, thereby dispensing with the necessityof nicety of fit in said threaded connection. It will also be noted thatthis same gland I takes above the unfiltered-water passage between theshaft A and the tube D, the compression of the gland I by means of thestuffing-nut G simultaneously packing the threaded joint (Z forpreventing connection between the respective filtered and unfilteredwater passages and the journal-joint between the packing-gland I and theshaft A for preventing leaking of the filter, making a highly useful andeconomical construction. It is an important feature of this invention,as it-affords a tight joint at the end of the exterior space around thecenter tube D, containing filtered water, and also at the end of theinterior space within the said center tube and around the shaft A,making it unnecessary to have a packing-gland about the shaft A at theother end thereof.

H is a duct for filtered water. The water entering the filter at fsurrounds the filtertube B, percolates through its walls and is therebycleansed, and is drawn out at the outet J.

The cleansing or scraping device K is any convenient form of scraper orbrush, &c., carried upon a spring L, of any suitable material, one endof which spring is securely attached to the scraper arms a or e. Saidspring is preferably of an elongated S curve in shape. The scraper K isborne at the middle thereof, and the other end Z of the spring L bearsagainst the interior of the casing of the filter, thus keeping thescraper K always in close contact with the filtrationtube B as thelatterwears smaller from usage. Two scrapers K are used, each coveringonehalf of the length of the filter and being on opposite ends of thecylinder from each other, by this means balancing their bearing forceupon the filter-tube, tending to preserve its alinement and making thecleaning operation easier.

It has been found in practice that in long filters provided with longfiltration-stones in which scrapers of the full length of the stone havebeen employed and in which the scrapers were turned .by awheel or crankdirect on the scraper shaft without the intervention ofpower-multiplying gearing great force was necessary to move thescrapers, making the same impracticable It has also been found that toplace a full-length scraper at one side of the stone only resulted inbinding of the parts and consequent stiffness in movement and undue wearupon the surface of the stone. In order to overcome these objections, Iprovide a plurality of scrapers whose combined length shall practicallyequal the length of the stone and which are arranged at various'pointsabout the longitudinal axis of the stone, preferably equidistantly, thusminimizing the resistance of the scrapers,preventing their binding,providing ease of operation, and preventing undue wear upon the stoneitself, thereby lengthening its. life.

To clean the filter, outlet f is opened. This permits the reverse fiowof the filtered water from the reservoir, in case one is used inconnection with the filter, in from the outlet J to the filtered-waterduct H, percolating thence outwardly through the filter-tube B, and thusto the outlet at f, thus cleansing the interior pores of the filter-tubeB at the same time the wheel is revolved, revolving the shaft A,revolving the scraper-frame E, with its prongs or forks e e, andcarrying the scrapers around the filter and scraping off the accumulatedmud and impurities, which fall to the bottom of the filter and arecarried out through the outlet f with the water.

Having thus described this water-filter, the features thereof that Iclaim as my invention, and desire to protect by Letters Patent, are asfollows:

1. In a water-filter, the combination of a containing vessel, a topcasting, a filtration' cylinder hollow through its axis, a center tubewithin the hollow axis of the cylinder threaded into the top casting atone end and flanged outwardly at the other holding thefiltrationcylinder in place, a-filtered-water chamber surrounding saidcenter tube, a center shaft within said center tube bearing a rotarycleaning device operated by a wheel or crank at the same end of thefilter at which the studing-nut, filtered-water duct and top casting arelocated, a packing-gland and stufiing-nut about the center shaft againstthe threaded end of the tube, and a duct for the drawing off of filteredwater at the same end of the filtered-water chamber as the saidstuffing-nut and top casting and crank or wheel, substantially as setforth.

2. In a water-filter the combination of a containing-vessel, afiltration-cylinder, a rotary scraper-frame, bearing two diametricallyopposite arms, one of which arms is equal in length to the entirecylinder and bears a scraper of one-half said length which scrapes theupper half of said cylinder, the other. of which is one-half the lengthof said cylinder and bears a scraper of one-half the length of saidcylinder scraping the lower half of said cylinder, said scrapers beingat diametrically opposite sides of said cylinder, substantially as setforth.

3. In a water-filter, the combination with a casing andfiltration-cylinder extending longitudinally of said casing, of acleaner-frame having a plurality of arms extending longitudinally of andarranged at different points about said cylinder, and cleaners ofsubstantiall y less length than said cylinder, said clean ersrespectively having operative connection with said respective arms andbeing located at different points longitudinally of and about saidcylinder, substantially as described.

4:. In a water-filter, the combination of a filtration-cylinder, acontaining vessel therefor, a frame in said containing vessel, means forrotating said frame from outside said contain-ing vessel, said frameembracing a pair of arms, one of which arms is substantially twice thelength of the other of said arms, a pair of scrapers having connectionwith said arms and disposed on opposite sides of saidfiltration-cylinder, said scrapers respectively taking solely againstopposite ends of said filtration-cylinder, substantially as described.

5. In a water-filter, the combination of a filtration-cylinder, acontaining vessel therefor, a frame in said containing vessel, means forretating said frame from outside said containing vessel, said frameembracing a pair of arms, one of which arms is substantially twice thelength of the other of said arms, a pair of scrapers having connectionwith said arms and disposed on opposite sides of said filtrationcylinder, said scrapers respectively taking solely against opposite endsof said filtration- IIS cylinder, said connectiorrof said scrapers withsaid respective arms consisting of springs secured at one end to saidrespective arms, said respective scrapers being secured to saidrespective springs intermediate of the ends of said springs and saidsprings having tail ends bearing against the inner wall of saidcontaining vessel with resilient pressure for urging said respectivescrapers against the wall of said filtration-cylinder with resilientpressure, substantially as described.

6. In a water-filter, the combination with a casing and end piecetherefor, said end piece having a bore and a flange at the inner end ofsaid bore, a filtering-cylinder, a securing-tube therefor threaded intosaid flange, a cleanershaft takingthrough said bore and tube, apacking-gland in said bore taking about said shaft and against saidflange and the threaded end of said tube, and a stuffing-nut forcompressing said packinggland, substantially as described.

7. In a water-filter, the combination with a casing and an end piecetherefor, of a hollow filtering-cylinder, a tube in the hollow thereof,securing means between said tube and end piece, an operating-shaft insaid tube taking past said securing means, cleaners operated by saidshaft, a packing-gland taking about said shaft and against said securingmeans, and a stuffing-nut for compressing said packing-gland about saidshaft and against said securing means, substantially as described.

8. In a water-filter, the combination with a casing and an end piecetherefor, a hollow filtering-cylinder, a tube in the hollow thereof forretaining it in place, said end piece having a bore and a flange at theinner end of said bore, connecting means between said flange and tube, acleaner-shaft in said bore and tube, a stuffing-nut threaded in saidbore, and a packi "gland in said bore between said nut and fi fa hge,said packing-gland compressed against said shaft and connecting means bysaid nut, substantially as described.

Signed September 27, 1904:.

M. NORMAN LYNN.

Attest:

WM. H. SCHMIDT, G. H. Gnnnun.

